___ the danger of drunk driving, many drivers promised never to drive after drinking.  [ ]

A. To realize    

B. To have realized    

C. Realized    

D. Having realized

我国目前发行的债券大多数采用的发行价格是（）。

A.按面值发行，按面值偿还，期间按期支付利息

B.按面值发行，本息和到期一次偿还

C.贴现发行，到期按面值偿还

D.溢价发行，到期按面值偿还